| Ariano Irpino to Octeville | 997.34 mi (1,605.06 km) |
| Ariano Irpino to Oignies | 865.96 mi (1,393.63 km) |
| Ariano Irpino to Oissel | 882.84 mi (1,420.80 km) |
| Ariano Irpino to Olivet | 796.55 mi (1,281.93 km) |
| Ariano Irpino to Ollioules | 492.65 mi (792.84 km) |
| Ariano Irpino to Olonne-sur-Mer | 916.49 mi (1,474.95 km) |
| Ariano Irpino to Oloron-Sainte-Marie | 814.73 mi (1,311.18 km) |
| Ariano Irpino to Onet Village | 670.79 mi (1,079.54 km) |
| Ariano Irpino to Onnaing | 842.93 mi (1,356.57 km) |
| Ariano Irpino to Orange | 561.17 mi (903.11 km) |
| Ariano Irpino to Orchies | 858.26 mi (1,381.24 km) |
| Ariano Irpino to Orleans | 797.59 mi (1,283.59 km) |
| Ariano Irpino to Orly | 810.86 mi (1,304.96 km) |
| Ariano Irpino to Ormesson-sur-Marne | 807.19 mi (1,299.04 km) |
| Ariano Irpino to Orsay | 816.69 mi (1,314.33 km) |
